Table 4.

Risk of gestational hypertension by quintile categories of FT4.

FT4 by quintile	n	n (%) with GH	OR (95% CI)	P value
Q1	244	21 (8.6)	1.37 (0.61–2.62)	0.404
Q2	246	18 (7.3)	1.26 (0.58–2.91)	0.551
Q3 (reference)	246	14 (5.6)	Reference
Q4	244	15 (6.1)	1.18 (0.57–2.49)	0.652
Q5	246	13 (5.3)	1.11 (0.52–2.33)	0.791

ORs were adjusted for maternal age, education, parity, delivery mode, pre-pregnancy body mass index, gestational weight gain, and newborn sex.

GH, gestational hypertension; OR, odds ratio; CI, confidence interval; FT4, free thyroxine.